<template>
  <div>
    <table
      border="1"
      width="700"
      style="border-collapse: collapse; margin:0 auto;"
    >
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th>
            <input type="checkbox" v-model="isShow" /> <span>全选</span>
          </th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
      </thead>
      <tbody>
        <ShopCar v-for="(item,index) in goodList" :key="index"
        :name="item.name"
        :price="item.price"
        :num="item.num"
        :index='index'
        @jisuan='numb'
        :checked="item.checked"
        />
      </tbody>
      <tfoot>
        <ToTal :obj='goodList' />
      </tfoot>
    </table>
  </div>
</template>

<script>
import ShopCar from './components/ShopCar.vue'
import ToTal from './components/ToTal'
export default {
  components: {
    ShopCar,
    ToTal,
  },
  data() {
    return {
      goodList: [
        {
          name: "诸葛亮",
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: "蔡文姬",
          price: 1500,
          num: 1,
          checked: false,
        },
        {
          name: "妲己",
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: "鲁班",
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    };
  },
  methods: {
    numb(val,i) {
      if(val == -1) {
        this.goodList[i].num>0 && this.goodList[i].num--
      }else if(val == 1) {
        this.goodList[i].num++
      }else if(val == 2) {
        this.goodList[i].checked = !this.goodList[i].checked
      }else{
        this.goodList.splice(i, 1)
      }
    },
  },
  computed: {
    isShow: {
      get() {
        return this.goodList.every(i=>i.checked)
      },
      set(val) {
        this.goodList.forEach(i=>i.checked = val)
      }
    },
  },
};
</script>

<style>
</style>